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Finding the Fourth Proportional to 171,666.54, 236,875.86 and 99,991.26

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Solution

The fourth proportional to 171,666.54, 236,875.86 and 99,991.26 is: 137,973.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,666.54 : 236,875.86 = 99,991.26 : x
  2. Step 2: Convert to fraction form
    171,666.54/236,875.86 = 99,991.26/x
  3. Step 3: Cross multiply
    171,666.54x = 236,875.86 × 99,991.26
  4. Step 4: Simplify right side
    171,666.54x = 23,685,515,704.98
  5. Step 5: Solve for x
    x = 23,685,515,704.98/171,666.54
  6. Step 6: Final answer
    x = 137,973.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.